Portion of a hummingbird feeder



FIG. 1 is a front perspective view of a portion of a hummingbird feeder showing my new design;

FIG. 2 is a front elevational view thereof, shown on a reduced scale; the back view being a mirror image;

FIG. 3 is a left side elevational view thereof, shown on a reduced scale; the right side view being a mirror image thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines are for purposes of illustration only and form no part of the claimed design. 

The ornamental design for portion of a hummingbird feeder, as shown. 